What is a gamete GCSE biology?

Cell division is one of the processes studied in GCSE Biology. … Gametes are the female and male sex cells – eggs and sperm. The gametes are made in the ovary and testes by a special type of reduction cell division called meiosis. Normal body cells contain 23 paired chromosomes giving a total of 46.

What is a gamete in biology?

Gametes are an organism’s reproductive cells. They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm. … The ova mature in the ovaries of females, and the sperm develop in the testes of males. Each sperm cell, or spermatozoon, is small and motile.

What is a gamete GCSE AQA?

The gametes contain half the number of chromosomes in each (haploid). When the male and female gametes combine they create the full complement of chromosomes (diploid) in order to create a human embryo. The gametes in: animals are sperm and eggs. flowering plants are pollen and eggs.

What does gametes mean BBC Bitesize?

Gametes are reproductive cells. Male gametes are called sperm. Female gametes are called ova.

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What are the gametes in plants GCSE?

The gametes in flowering plants are pollen (male) and ovules (female). The offspring produced in sexual reproduction are genetically different to each other and to their parents. This process results in variation within a population because it involves the mixing of genetic information.

What is in a gamete?

A gamete is the mature reproductive or sex cell that contains a haploid number of chromosomes (i.e., 50% of the genetic material or only one set of dissimilar chromosomes) and is capable of fusing with another haploid reproductive cell to form a diploid zygote.

What is Gametophyte in biology?

A gametophyte (/ɡəˈmiːtəfaɪt/) is one of the two alternating multicellular phases in the life cycles of plants and algae. It is a haploid multicellular organism that develops from a haploid spore that has one set of chromosomes. The gametophyte is the sexual phase in the life cycle of plants and algae.

What is gamete ks3?

Gametes are the male and female sex cells: ova are female gametes. sperm are male gametes.

How are gametes produced GCSE?

Sexual reproduction uses the process of meiosis , which creates gametes . These are sperm and eggs (ova) in animals, and pollen and ova in plants. The process of meiosis happens in the male and female reproductive organs. … the cell divides twice to form four gametes, each with a single set of chromosomes.

What is mitosis GCSE biology?

Mitosis is a type of cell division in which a diploid body cell copies itself and finally divides into two identical diploid daughter cells . The daughter cells are clones of each other. Every base pair of their DNA is identical.

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What happens to gametes during fertilization?

During the process of fertilization, a series of reactions triggers the fusion of gametes to produce a diploid cell called a zygote. … Sperm-egg binding is thought to induce the acrosome reaction, in which the sperm cell releases enzymes that degrade the zona pellucida and prepares the gamete cell membranes for fusion.

Why are gametes in a single plant genetically different?

A copy of all of the genetic information is made. The cell divides twice to form four gametes, each with a single set of chromosomes (haploid ). This means the chromosome number has halved. All gametes are genetically different from each other.

What are the gametes produced by plants?

Plants use meiosis to produce spores that develop into multicellular haploid gametophytes which produce gametes by mitosis. The sperm are formed in an organ known as the antheridium and the egg cells in a flask-shaped organ called the archegonium.

What is meiosis GCSE?

Meiosis is the type of cell division that produces gametes . A human body cell contains 46 chromosomes arranged in 23 pairs. Human gametes are haploid – so their nucleus only contains a single set of 23 unpaired chromosomes.

What are chromosomes GCSE?

Chromosomes are thin strands of DNA (deoxyribonucleic acid). They are subdivided into genes . In most cells, chromosomes are located in functional pairs in the nucleus . Humans have 46 chromosomes arranged in 23 pairs.